code: def absolute(current: np.ndarray, prev: np.ndarray) -> np.ndarray:
      diff = current - prev  # type: ignore
      return np.abs(diff)
  
file_path: pymc/pymc/variational/callbacks.py
imports: import collections
  from typing import Callable, Dict
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: absolute(current, prev) and returns: np